Gas and liquid fuel burner

ABSTRACT

A NOZZLE FOR A FUEL BURNER UTILIZING AIR ASPERATION TO DRAW EFFICIENT MANNER WHILE PROVIDING A SIMPLE CONSTRUCTION UTILIZING CONVENTIONAL PIPE FITTINGS TO CONSTRUCT THE DEVICE.

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[72] Inventor Curl 1R. Gulh 5 References m 10215 N. 38"] SL, PhOQDlX,Ark. @5251 UNITED STATES PATENTS P 5232 453,357 6/1891 Lyle 239/424 1Filed 2 461 731 2/1949 011111 431/352X [45] Patented June 28,1971

Primary Examiner-Carroll B. Dority, Jr. Attorney-Willard L. Groene [54]GAS AND lLlQUlll) IFUIEL BURNER 2 Claims, 3 Drawing Figs.

[52] US. Cl .4 431/353,

239/4195. 239/424 ABSTRACT: A nozzle for a fuel burner utilizing airasperation [51] int. Cl F2311 15/02 to draw the fuel from the nozzle tipand mix with the fuel in a [50] Field oi Sent-ch 431/35 lhighlyefficient manner while providing a simple construction utilizingconventional pipe fittings to construct the device.

GAS AND LIQUID FUEL BURNER i BACKGROUND OF THE INVENTION This inventionis directed to fuel burner nozzles, and is particularly directed to andimproved nozzle in which the air aspiration is brought in at rightangles to the fuel discharge jet passageway ofthe nozzle.

Heretofore, air aspirated nozzles of the above-cited type was applied atan angle directed in the direction of discharge of the fuel jet outletto cause the nozzle to provide the necessary atomization and mixing ofthe fuel and air. This required costly and difficult to make jetelements for the nozzles. These elements of the burner were special innature and could not be made from standard pipe fittings. Also, informer devices it was difficult to vary or change the jet inserts fordifferent types offuels and character of flame performance desired.

SUMMARY OF THE INVENTION One ofthe objects of this invention is toprovide a simple jet structure for a fuel burner that is easy toassemble and change for different fuels.

Still another object is to provide a burnerjet arrangement in which theaspirating air come in at right angles to the jet axis and surrounds thejet while aspirating the fuel as the air leaves the end of thejetelement.

It is also an object to provide a straight cylindrical jet which mayreadily be mounted in standard pipe fittings to form the burnerassembly.

Another object is to provide a straight elongated jet tube surrounded bythe aspirating air chamber in which the outer discharge end of the jetis flared into bell shape outwardly of the discharge opening oftheaspirated air passageway.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a general perspective viewof a gas burner incorporating the features of this invention.

FIG. 2 is an enlarged fragmentary sectional view of the burner on theline 22 of FIG. 1.

FIGv 3 is an enlarged sectional view of the jet element of the nozzlestructure ofthe burner.

DESCRIPTION OF THE PREFERRED EMBODIMENT As an example of one embodimentof this invention, there is shown a gas and liquid fuel burner having amain support element which may take the form of a conventional pipe Thaving an integral flange ill to which is secured the burner flameshroud 12 by suitable studs 13 and nuts M.

The nozzle element 15 comprises a cylindrical shank portion 16 having areduced front end diameter 17 upon which is securely fitted the airsupply sleeve 18 having an air supply passageway bore 19. The members16-18 are appropriately secured by suitable seals 20 and 21 in theT-fitting lll] as best seen in FIG. 2.

The reduced diameter portion 17 has ajet extension tube 22 terminatingin a flared bell-shaped flange 23 at its outer end. The air passageway24 formed by the bore I9 surrounding the jet extension tube 22terminates in the radially outwardly extending surface 25 set backrearwardly from the outer face 26 ofthe flange lip 23. A beveled edgesurface 27 is formed at the outer end of the bore I9.

Rearwardly of the sleeve 18 and adjacent the end of the shank I6 islaterally disposed air inlet port 28 formed in the sleeve 18. This port28 is aligned with lateral air passageway 29 of the pipe T 10. Gas orliquid fuel is supplied from pipe 29 while compressed air is provided bypipe 30, each controlled by suitable valves 31 and 32 respectively. Asthe fuel proceeds through the fuel jet passageway 33 and out the end 26,air flowing out over the beveled edge 27 and across the flange lip 23aspirates the fuel laterally to cause it to combine with the air asignition takes place.

Iclaim:

ll. A fuel burner comprising:

A. a main su port element having the form ofa pipe T; B. a burner ameshroud mounted on the main support;

C. a nozzle element in the main support element characterized by:

a cylindrical shank portion including a fuel jet passageway having:

E. a reduced front end;

F. an air supply sleeve having an air supply passageway bore securelyfitted to the reduced front end of the cylindrical shank;

G. a jet extension tube formed on the outer end of the reduced front endofthe shank;

H. a flared bellshaped flange having a lip formed on the outer end ofthe jet extension tube;

Iv the air supply passageway bore of the sleeve surrounds the jetextension tube and terminates in a radially outwardly extending surfacesetback rearwardly from the outer face ofthe bell-shaped flange lip;

J. a beveled edge surface on the outer end of the air supply passagewaybore of the sleeve;

K. a laterally disposed air inlet port formed in and rearwardly oftheair supply sleeve and adjacent the end of the shank;

Li a fuel supply connected to the fueljet passageway; and

M. an air supply connected to the laterally disposed air inlet port.

2. In a burner as in claim 1 wherein the main support pipe T elementserves as the fuel and air supply connections to the nozzle element.

